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We propose an optimal asymmetric resource allocation (ARA) algorithm for the decode-and-forward (DF) dualhop multi-relay Long Term Evolution Advanced (LTE-Advanced) system in the downlink, with orthogonal frequency division multiplexing (OFDM) transmission. Our work is different in that the time slots for the two hops via each of the relays are designed to be asymmetric, i.e., with K relays in the...
This letter proposes a subchannel renumbering (SCR) scheme to improve frequency resource utilization in IEEE 802.16 OFDMA systems. SCR rearranges the logical subchannel numbers to derive a group of contiguous subchannels with a high burst profile such that BS can allocate these subchannels to MSs to enhance system throughput. Simulation results validate that SCR can achieve higher subchannel utilization...
Carrier aggregation (CA) is one of the most distinct features for LTE-Advanced systems, which can support a much wider transmission bandwidth up to 100 MHz by aggregating two or more individual component carriers (CCs) belonging to the same (intra-band) or different (inter-band) frequency bands. With CA, it is possible to schedule a user equipment (UE) on multiple CCs simultaneously. From radio resource...
In this paper, we develop a simulation tool to study the performance of hybrid femtocell access in a High-Speed Downlink Packet Access (HSDPA) network. A hybrid resource allocation scheduler is developed in order to balance the tradeoff between open and closed femto access strategies. Performance in terms of macrocell traffic offloading is investigated under the dynamic configuration of a network...
The adaptive resource allocation will be a key technique of the OFDMA systems in the future wireless networks due to the great improvement of the network throughput. However, in order to allocate the subcarriers and power adaptively, the users need to send back the channel state information (CSI) periodically to the base station. The feedback overhead is huge, and it brings a big burden to the uplink...
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